Title and Email Reflector
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Chairs
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Mtg
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JCT-VC project management (AHG1)
(jct-vc@lists.rwth-aachen.de)
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Coordinate overall JCT-VC interim efforts.
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Report on project status to JCT-VC reflector.
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Provide report to next meeting on project coordination status.
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G. J. Sullivan, J.-R. Ohm (co chairs)
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N
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HEVC test model editing and errata reporting (AHG2)
(jct-vc@lists.rwth-aachen.de)
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Produce and finalize JCTVC-N1002 HEVC Test Model 12 (HM 12) Encoder Description.
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Collect reports of errata for HEVC version 1 text specification.
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Gather and address comments for refinement of these documents.
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Coordinate with AHG3 on software development and HM software technical evaluation to address issues relating to mismatches between software and text.
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B. Bross, K. McCann (co chairs), W.-J. Han, I. K. Kim, J. R. Ohm, K. Sugimoto, G. J. Sullivan, Y. K. Wang, T. Wiegand (vice chairs)
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N
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HEVC HM software development and software technical evaluation (AHG3)
(jct-vc@lists.rwth-aachen.de)
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Coordinate development of the HM software and its distribution.
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Produce documentation of software usage for distribution with the software.
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Prepare and deliver HM 12.0 software version (by 2013-08-04 for ISO/IEC DIS ballot) and the reference configuration encodings according to JCTVC-L1100 common conditions (expected within two weeks after the meeting).
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Prepare and deliver additional "dot" version software releases and software branches as appropriate.
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Suggest configuration files for additional testing of tools.
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Coordinate with AHG2 on HEVC test model editing and errata reporting to identify any mismatches between software and text.
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F. Bossen (chair),
D. Flynn, K. Sühring (vice chairs)
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N
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HEVC conformance test development (AHG4)
(jct-vc@lists.rwth-aachen.de)
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Study the requirements of HEVC conformance testing to ensure interoperability.
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Discuss the work plan needed to develop HEVC conformance testing.
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Study potential testing methodology to fulfil the requirements of HEVC conformance testing.
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Establish and coordinate bitstream exchange activities for HEVC.
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Study to develop a potential set of HEVC conformance bitstreams.
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T. Suzuki, W. Wan (co chairs)
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N
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HEVC range extensions development (AHG5)
(jct-vc@lists.rwth-aachen.de)
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Study aspects of the technical design and develop software relating to the support of non-4:2:0 chroma formats, bit depths beyond 8 bits, and auxiliary/alpha channel coding, in coordination with AHG7 and AHG18.
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Perform memory bandwidth analysis of the range extensions technical design and its proposed modifications.
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Evaluate blocking artifacts in 4:4:4 chroma format coding and set up a plan for subjective testing of associated techniques at the next meeting.
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Discuss and propose test conditions and test material for the development of the range extensions.
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Study techniques for colour conversion and resampling and their relationship to non-4:2:0 chroma coding.
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M. Naccari, C. Rosewarne (co chairs)
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N
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Range extensions draft text (AHG6)
(jct-vc@lists.rwth-aachen.de)
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Produce and finalize JCTVC-N1005 HEVC RExt draft text.
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Gather and address comments for refinement of the text.
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Coordinate with AHG7 on range extensions software development to address any identified issues regarding text and software relationship.
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J. Sole (primary), D. Flynn, C. Rosewarne, T. Suzuki
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N
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Range extensions software development (AHG7)
(jct-vc@lists.rwth-aachen.de)
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Coordinate development of the HM RExt software and its distribution
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Produce documentation of software usage for distribution with the software
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Prepare and deliver HM 11.0-RExt-4.0 software version and the reference configuration encodings according to JCTVC-N1006.
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Prepare and deliver additional "dot" version software releases and software branches as appropriate.
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Perform analysis and reconfirmation checks of the behaviour of the draft design, and report the results of such analysis.
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Suggest configuration files for additional testing of tools.
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Coordinate with AHG6 on range extensions draft text to address any identified issues regarding text and software relationship.
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D. Flynn, K. Sharman (co chairs)
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N
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Screen content coding (AHG8)
(jct-vc@lists.rwth-aachen.de)
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Study (lossy and lossless) coding tools and performance of HEVC and its range extensions on screen content.
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Evaluate and identify test material appropriate for testing screen content coding performance.
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Make recommendations for test conditions for screen content coding.
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Coordinate for finalization of the test conditions for CEs relating to lossless and screen content coding.
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H. Yu (chair), R. Cohen, A. Duenas, D.-K. Kwon, T. Lin, J. Xu (vice chairs)
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N
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High-level syntax for HEVC extensions (AHG9)
(jct-vc@lists.rwth-aachen.de)
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Identify opportunities for common approaches for multi-view and scalable high-level extensions of HEVC.
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Study NAL unit header, video parameter set, sequence parameter set, picture parameter set, and slice header syntax designs.
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Study SEI messages and VUI syntax designs needed for HEVC extensions.
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Assist in software development and text drafting for the high-level syntax in the HEVC extensions designs.
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Study the high level syntax for auxiliary pictures with consideration of JCTVC-N0063/JCT3V-E0049 as well as signalling for carrying alpha channel and 4:4:4 chroma enhancement as auxiliary pictures.
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Study JCTVC-N0355/JCT3V-E0092 and other mechanisms to extend the number of layers (beyond 64) in comparison with reserving nuh_layer_id value of 63 to provide an extension, in terms of functionality supported and signalling efficiency.
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Coordinate efforts with JCT-3V AHG7 on high-level syntax issues in relation to 3D extensions.
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M. M. Hannuksela (chair), J. Boyce, Y. Chen, S. Deshpande, A. Norkin, Y. K. Wang, (vice chairs)
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N
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SHVC core experiments (AHG10)
(jct-vc@lists.rwth-aachen.de)
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Establish configurations, generate anchors, and create reporting sheets for SHVC CEs.
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Provide configuration data to be used in SHVC CEs (within one week after SHM 3.0 software is available).
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Discuss and identify additional issues related to SHVC CEs.
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X. Li (chair), J. Boyce, P. Onno, X. Xiu (vice chairs)
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N
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SHVC text editing (AHG11)
(jct-vc@lists.rwth-aachen.de)
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Produce and finalize JCTVC-N1007 SHVC Test Model 3 (SHM 3) text.
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Produce and finalize JCTVC-N1008 SHVC text specification Draft 3.
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Gather and address comments for corrections and editorial improvements of these documents.
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Coordinate with AHG12 on SHVC software development to address issues relating to mismatches between software and text.
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J. Chen (chair), J. Boyce, M. M. Hannuksela Y. Ye (vice chairs)
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N
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SHVC software development (AHG12)
(jct-vc@lists.rwth-aachen.de)
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Prepare SHM 3.0 software (based on HM 11) for experimentation.
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Provide software to CEs within two weeks after the meeting.
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Remove IntraBL framework from SHM software.
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Bring software into alignment with HM 12 by the next meeting.
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Discuss and identify additional issues related to SHVC software.
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V. Seregin (chair), T. Chuang, Y. He, D. Kwon (vice chairs)
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N
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SHVC inter-layer filtering (AHG13)
(jct-vc@lists.rwth-aachen.de)
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Study alternative upsampling and downsampling filters for spatial scalability.
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Study the effect of taking into account chroma position alignment during resampling processing.
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Identify alternative candidate resampling filters and distribute associated downsampled test material within three weeks after the meeting.
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Study resampling filters with ratios other than 1.5 and 2.0 (and 1.0).
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Discuss and identify additional issues related to inter-layer filtering.
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E. Alshina (chair), J. Chen, J. Dong, A. Segall P. Topiwala (vice chairs)
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N
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Colour gamut scalability (AHG14)
(jct-vc@lists.rwth-aachen.de)
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Study methods for colour gamut scalable coding.
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Study the interaction of colour gamut scalability with bit-depth and spatial scalability.
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Identify test sequences and test conditions.
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Discuss and identify additional issues related to colour gamut scalability.
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A. Duenas, A. Segall (co chairs), P. Bordes, J. Dong, D. K. Kwon, X. Li (vice chairs)
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N
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Hybrid codec scalability (AHG15)
(jct-vc@lists.rwth-aachen.de)
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Coordinate with AHG12 on software development and anchor support for AVC base layer.
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Study methods for base layer codec identification and picture alignment, including use of encapsulation, and identification of external means.
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Study profile and level specification methods for hybrid codec scalability.
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J. Boyce, K. Kawamura (co chairs)
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N
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Single-loop scalability (AHG16)
(jct-vc@lists.rwth-aachen.de)
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Study and compare single-loop and multi-loop SNR scalability.
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Analyze and compare the memory bandwidth of single-loop and multi-loop scalability and the use of "key pictures".
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Study the rate-distortion performance and complexity impact of single-loop scalability using residual refinement techniques and by signalling inter-layer prediction restrictions on a multi-loop design.
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Study and analyze the performance and complexity impact of inter-layer inter prediction tools for single-loop and multi-loop scalability.
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M. Wien (chair), M. Budagavi, K. Misra, K. Rapaka, K. Ugur, X. Xiu (co-chairs)
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N
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SHVC complexity assessment (AHG17)
(jct-vc@lists.rwth-aachen.de)
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Study memory bandwidth, memory usage and computational complexity of scalable tools and methodologies to evaluate them.
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Study restrictions to reduce the complexity of scalable tools and evaluate the impact of such restrictions on coding efficiency.
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Prepare a report analyzing performance and complexity of single-layer, simulcast, and scalable coding configurations for 1.0, 1.5, and 2.0 and arbitrary scalability ratio (e.g. ~1.75) cases.
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Coordinate with SCE developments and provide a template to be used for complexity analysis of SHM3.0, single-layer coding, and SCE techniques.
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E. Alshina (chair), M. Budagavi, J. Dong, E. François, J. Kang, X. Li, A. Tabatabai (vice chairs)
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N
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High bit-rate & bit-depth operating points (AHG18)
(jct-vc@lists.rwth-aachen.de)
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Study the accuracy needed for internal processing elements to support bit depths up to 16-bits per sample.
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Study relationship to lossless coding capability.
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Verify rate-distortion optimization behaviour for high bit rates and high bit depths.
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Study entropy coding operation and throughput at high bit rates and high bit depths and potential needs for associated design modification.
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Identify test sequences and test conditions for testing high bit rate and high bit depth coding behaviour.
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Prepare software implementation for technical investigation of new features intended for high bit rates and high bit depths.
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Study coding performance at high bit-rate and high bit depth operating points and investigate the benefit over existing standards.
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K. Sharman (chair), E. François, H.-Y. Kim (vice chairs)
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N
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Verification test preparation (AHG19)
(jct-vc@lists.rwth-aachen.de)
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Identify test conditions and test sequences for verification of HEVC compression capability, including consideration of use case scenarios for random access and low delay operation.
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Identify bit rates, picture resolutions and bit depths appropriate for HEVC verification.
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Identify appropriate encoder usage for comparison of HEVC and AVC compression capability.
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Communicate with subjective test coordinator to ensure test design validity.
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Generate and collect candidate HEVC and AVC encoded bitstreams for HEVC verification testing.
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Review and edit the HEVC verification test plan JCTVC-N1011.
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T. K. Tan, V. Baroncini (co chairs), M. Karczewicz, M. Mrak, W. Wan, J. Wen (vice chairs)
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N
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Multi-layer hypothetical reference decoder (AHG20)
(jct-vc@lists.rwth-aachen.de)
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Study the issues related to layer-specific and combined multi-layer HRD operation (including DPB and CPB), including the proposed .
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Identify layer-specific or combined multi-layer HRD operations that need to be addressed at the system and/or video coding layer.
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Study issues and implications of either or both HRD mechanisms when adding or removing layers at re-distribution points.
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Study issues and implications of layer-specific buffer operation in relevant application contexts.
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Study high-level syntax needs for HRD information, e.g. in SEI, SPS VUI, or VPS VUI.
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K. Suehring, A. Tabatabai (co chairs), S. Deshpande, M. M. Hannuksela, J. Kang, A. K. Ramasubramonian (vice chairs)
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N
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Best-effort decoding with reduced decoding complexity (AHG21)
(jct-vc@lists.rwth-aachen.de)
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Identify use cases and key functional elements for application of reduced-complexity decoding processes for decoding of bitstreams encoded for HEVC and its extensions
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Analyze tradeoffs for optimization of video quality in the application of reduced-complexity decoding processes
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Particularly study characteristics of design and optimization for decoding processes with reduced bit depth
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Consider and analyze the impact of inter-picture dependencies and cross-region spatial prediction dependencies in the application of reduced-complexity decoding processes
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Study potential approaches to describe/specify the provision of best-effort decoding capabilities in the HEVC text specification
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D. Flynn, J. Sole, M. Zhou (co chairs)
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N
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Test sequence material (AHG22)
(jct-vc@lists.rwth-aachen.de)
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Maintain the video sequence test material database for HEVC development.
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Identify, collect, and make available a variety of video sequence test material.
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Study coding performance and characteristics in relation to video test materials.
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Identify and recommend appropriate test materials and corresponding test conditions for use in development of HEVC and its extensions.
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Coordinate with the activities in AHG8 on screen content coding and AHG19 for verification test development.
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T. Suzuki, R. Cohen (co chairs), T. K. Tan, S. Wenger (vice chairs)
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N
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